Inelastic pipe elements for analysis of pipe whip

The production of economical and safe designs for pipe whip restraints requires inelastic dynamic analysis of the piping under a time-varying force at the rupture location. In this analysis, it is important to recognize that the pipe may be subject to torsional moment plus bending moments about two axes, and that correct modelling of the system requires that interaction among these moments be considered. The purpose of this paper is to compare two alterntive assumptions for the effects of moment interaction following yeilding of the pipe. (Auth.)